EN ISO 4120-2007 en Sensory analysis - Methodology - Triangle test《感官分析 方法学 三角试验》.pdf
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1、BRITISH STANDARD Sensory analysis Methodology Triangle test ICS 67.240 BS EN ISO 4120:2007 Incorporating May 2009 corrigendum This British Standard was published under the authority of the Standards Policy and Strategy Committee on 1 July 2004 BSI 2009 National foreword The UK participation in its p
2、reparation was entrusted to Technical Committee AW/12, Sensory analysis. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct a
3、pplication. BS EN ISO 4120:2007 This British Standard is the UK implementation of EN ISO 4120:2007. It is identical with ISO 4120:2004. It supersedes BS ISO 4120:2004, which is withdrawn. Compliance with a British Standard cannot confer immunity from legal obligations. ISBN 978 0 580 59377 2 Date Co
4、mments 31 May 2009 This corrigendum renumbers BS ISO 4120:2004 as BS EN ISO 4120:2007 Amendments/corrigenda issued since publication EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO4120 July2007 ICS67.240 EnglishVersion SensoryanalysisMethodologyTriangletest(ISO4120:2004) AnalysesensorielleMthod
5、ologieEssaitriangulaire(ISO 4120:2004) SensorischeAnalysePrfverfahrenDreiecksprfung (ISO4120:2004) ThisEuropeanStandardwasapprovedbyCENon12July2007. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropean Standardthestatusofanationalstandardwit
6、houtanyalteration.Uptodatelistsandbibliographicalreferencesconcerningsuchnational standardsmaybeobtainedonapplicationtotheCENManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytranslation undertheresponsibilityof
7、aCENmemberintoitsownlanguageandnotifiedtotheCENManagementCentrehasthesamestatusasthe officialversions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Cyprus,CzechRepublic,Denmark,Estonia,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta
8、,Netherlands,Norway,Poland,Portugal, Romania,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2007CEN Allrightsofexploitationinanyformandbyanymeansres
9、erved worldwideforCENnationalMembers. Ref.No.ENISO4120:2007:EIS:0214 O4002(E) I SO 4002 All irthgs ersedevr iii Contents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Principle . 2 5 General test conditions and requirements. 3 6 Assessors 3 6.1 Qualification 3 6.
10、2 Number of assessors 3 7 Procedure. 4 8 Analysis and interpretation of results 4 8.1 When testing for a difference 4 8.2 When testing for similarity. 5 9 Test report 5 10 Precision and bias 5 Annex A (normative) Tables 6 Annex B (informative) Examples. 10 Bibliography . 15 BS EN ISO 4120:2007 EN IS
11、O 4120:2007 (E)Foreword The text of ISO 4120:2004 has been prepared by Technical Committee ISO/TC 34 “Agricultural food products” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 4120:2007 by Technical Committee CEN/SS C01 “Food Products“, the secretariat
12、 of which is held by CMC. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2008, and conflicting national standards shall be withdrawn at the latest by January 2008. According to the CEN/CE
13、NELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxe
14、mbourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 4120:2004 has been approved by CEN as EN ISO 4120:2007 without any modifications. iv BS EN ISO 4120:2007 EN ISO 4120:2007 (E)INTENRATIO
15、NAL TSANDADR IS:0214 O4002(E) I SO 4002 All irthgs ersedevr 1 Sensory analysis Methodology Triangle test 1 Scope This International Standard describes a procedure for determining whether a perceptible sensory difference or similarity exists between samples of two products. The method is a forced-cho
16、ice procedure. The method is applicable whether a difference exists in a single sensory attribute or in several attributes. The method is statistically more efficient than the duo-trio test (described in ISO 10399), but has limited use with products that exhibit strong carryover and/or lingering fla
17、vours. The method is applicable even when the nature of the difference is unknown i.e. it determines neither the size nor the direction of difference between samples, nor is there any indication of the attribute(s) responsible for the difference. The method is applicable only if the products are fai
18、rly homogeneous. The method is effective for a) determining that either a perceptible difference results (triangle testing for difference), or a perceptible difference does not result (triangle testing for similarity) when, for example, a change is made in ingredients, processing, packaging, handlin
19、g or storage; b) or for selecting, training and monitoring assessors. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced d
20、ocument (including any amendments) applies. ISO 5492:1992, Sensory analysis Vocabulary ISO 8589:1988, Sensory analysis General guidance for the design of test rooms 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5492 and the following apply. 3.1 alp
21、ha-risk -risk probability of concluding that a perceptible difference exists when one does not NOTE This is also known as Type I error, significance level or false positive rate. BS EN ISO 4120:2007 EN ISO 4120:2007 (E)IS:0214 O4002(E) 2 I SO 4002 All irthgs ersedevr 3.2 beta-risk -risk probability
22、of concluding that no perceptible difference exists when one does NOTE This is also known as Type II error or false negative rate. 3.3 difference situation in which samples can be distinguished based on their sensory properties NOTE The proportion of assessments in which a perceptible difference is
23、detected between the two products is given the symbol p d . 3.4 product material to be evaluated 3.5 sample unit of product prepared, presented and evaluated in the test 3.6 sensitivity general term used to summarize the performance characteristics of the test NOTE In statistical terms, the sensitiv
24、ity of the test is defined by the values of , and p d . 3.7 similarity situation in which any perceptible differences between the samples are so small that the products can be used interchangeably 3.8 triad those three samples given to an assessor in the triangle test NOTE In the triangle test, each
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